Attachment for mouthpieces of telephone-transmitters.



No. 837,304. PATENTED DEC. 4, 1906.

J. G. KTUHELL. ATTACHMENT FOR MOUTHPIEES F TELEPHGNE TRANSMITTERS.

APPLICATION FILED NOV.Z1,1905.

JOSEPH Gr. 'KTCHELL OF NEW YORK,l N. Y'. u

,'/i'rTACHMEN-r Fon MOUTHPIEGES oF TELEPHONE-TRANSMITTERQ Application tiled November 21,1905. Serial No. 288,364.

T0 @ZZ when it iii/ity con/cern:

@Beit :known that I, JOSEPH G. KITCHELL, a citizen ofthe United States, and a resident of the city, county, and State of. New York,

have;invented certain new and useful. Ini-l proveinents in Attachments for Mouthpieces of Telephone-Transinitters, of which the following is a specification. n

My invention relates to an improvement in an attachment for mouthpieces of tele- -phone-transmitters to prevent what is said y the peison talking in the ltelephone from being overheard' by any one near by.

One of the objects of my invention is to make such an attachment as may be portable and easily attached to or removed from the mouthpiece of a telephone and that will not only cover the mouth, but extend beyond the mouth] so as to permit uninterrupted Amovement of thelips in talking, and willfalso prevent the soundk from being heard outside the telephone;

Other objects will appearfrom the hereinafter description.' y'

My invention is illustrated in the accompanying drawings, in which the same reference character indicates the same part in the different views.' g

OnV the drawings, Figure l represents a cross-section of one type of my attachment shown connected to the mouthpiece of an ordinary telephone. Fig. 2 is a cross-section ofa modification, and Fig. 3 is a cross-section of still another modification.

The parts marked A and B are the inner and outer tubes or walls of the attachment. They are made of a material such as hard rubber, papier-mch, Celluloid, or the like and ar formed, preferably,in one piece, with an air space C between them. The inner tube i/s providedwith an opening a near the forward end thereof., and the outer tube or .wall is providedrwith an opening b at the Y, other Vend thereof. 4&5,

.D is an outside coyering, of flexible or vulcanizedrubb'er or other similar sound-deadf enind` material. This sound-deadening niay ./te ri buter. wall or tube B, or it may cover com 5o .pletely the outer surfaces of both walls, as

V may extend only on the outside of the shown in theV drawings.

E is a flexible mouthpiece which is connected to the tubes A and B.. This mouth'- piece is large enough to not only cover the" mouth, but extends some distance there- Specification of Letters Patent.

Patented Dec. 4, 1906.

from, so as to permit free use ('ifftl ie5"l 'i i in talking. The edges are shaped'ft'o'conform to the contour of the face. In the V struction shown in Figjfl 1 this 'mouth may extend from the edges .of the-"walls A and B and is connected vto the wallsfat these In the construction shown in Fig. 2 Ithe inner and outer walls A and B are mergedftogether, as shown at A',` with anoutturn'ed edge A2, and the mouthpiece has'g'a contracted portieri, as shown atE, which-fits over the turned end A2 of thewalls, by'whichthe mouthpiece is fastened yto vthe tubi-is.si yIn' this construction the mouthpiece 'mayl be readily attached or detached fromthe tube, and different forms of inouthpieces may be used. ,f

In the modification shown in Fig. '3"1 havemade the iimer and outerwwalls A andl B of separate pieces, but have joinedtheinjtogether at their ends, as,shown at`fA". "The wall B is extended to thev eripheryfofthe transmitter l, as shown at B instead :ofbeing formed and connected to the/.forward edge of the inner tube A and resting olii the front part of the transmitter, as ,s hw'n in Figs. l and 2. This third construction, it will be seen, covers entirely .the front'face of the transmitter and prevents any vibrations therein from being transmitted beyondA the tion completely drowns'the vibration ofthe transmitter, as well as preventing what is spoken into the telephone frombeingdieard byy any one near the. transinitter'., The mouthpiece in this case is also made ofiexible material, with an out-turned edge E2, which is connected to the edge A? ofthe meeting ends ofthe two tubes A andfB. 4The diameter of the inner tube A is lsuchthat it will bear against the edge ZTand fitti'ghtly on the transmitter 2, leaving an airspace Of between the wall of thetransmitterandthe inner wall of the attachment, and, a s.wil,l be seen, the diameter of the outer 'tubefi's such as lto leave a clear air-space@ betweengthe two'tubes A and B. Ina device of somewhat similarconstruction made before my invention the' attach- .nient conceals or excludes sound'onlyin its lpassage from the lips to theopening the mouthpiece, but does nc t subdue yorbmiiffle l the sounds after they are conducted to that attachment. In other words, this, construcedges, forming the inclosed air-space Cfab'o've l if W79 IOO IIC

opening. Inother words, the sounds are unmuled while vibrating or sounding inside the mouthpiece proper or the fixed mouthpiece of the transmitter. There is no deadening Wall or walls surrounding the mouthpiece. Hence sounds are reflected from the hard-rubber wall or shell out of which these attachments have heretofore been made.

. are liable to get out of order and permit leal;-

age of direct voice-vibrations in their passage from the attachment to the transmitter. In an attachment of this kind, where it is only used on special occasions and when demanded must be instantly attached, any means of quick attachment and detachment is a marked improvement. From this it is seen rthat the attachment is practically in 'one piece and cannot easily get out of order. Its

vconstructionis such that it projects only a slight distancebeyond the edge of the mouthpiece of the transmitter and is therefore not an incumbrance, It is so constructed that-it can be made without using any exposed met-al either in itself or in the parts attaching it. Itcan be instantly sterilized without injury to the same. 1

I'Vhile I have shown a certain type of this construction, I do not wish to bennderstood that I ,am limited to the exact construction shown and described, as various changes and modifications can be made without departin from my invention.

' aving now described niy invention, what I claim as new,and desire to secure by Letters Patent, is-

1. In a device of the class described, a mouthpiece of a telephone, a wall surrounding the outsidev of said mouthpiece, bearing against the front flaring edge thereof an resting against the front face of the transmitter to form a dead-air space between the said mouthpiece and said wall, another wall concentric to the first wall, having an air-space between, and a mouthpiece connected to the forward ends and bridging` said walls.

2. In a devia; of the class described, a mouthpiece of 4a telephone, a wall surrounding said mouthpiece with an air-space between the said wall and the mouthpiece, a second wall concentric to the first 'wall and separated therefrom to form an air-space between said walls, the space between walls being closed at each end, and ein-n r having an opening therein at opposite i :li:` leading into the air-space, and a moin [ipa-ce connected to the outer ends of said walls.

3. In a device of the class described, an inner and outer concentric wall having an airspace between, said air-space being closed at each end, each wall having an opening therein at opposite ends leading into the air-space, the said walls adapted to be comiected to the lmouthpiece of a telephone-transmitter so as Jtoileave an air-space between *he said mouthpiece and the inner wall of said device, anothermouthpiece connected to said walls,

and a detachable mouthpiece connected to saidwalls.

Ll. a device of the cla-ss described, an inner `and an outer wall with an air-space between, a sound-deadening material secured to the outer surface of the outer wall, and a mouthpiece connected to the walls.

.5.. In a device of the class described, an inner'a-nd an outer wall with an air-space between', sound-deadening material secured to the inner surface of the inner wall, and also sound-deadening material surrounding and secured to the outer surface of the outer wall.

6. In a device of the class described', an inner and an outer concentric wall wi th an airspace between, sound-dea-dening material covering the outer wall, the diameter of the inner wall being such as to tightly fit over the mouthpiece of a telephone-transmitter,

leaving anair-space between said mouthpiecel and said inner wall, and another mouthpiecegconneeted to said walls.

' 7. y'In a. device-'of the class described, an inner and an outer concentric wall constructed of hard rubber, said walls when in use havingT both ends inclosed with an air-space between, a soft-rubber covering for said wall or walls, each of said walls having an opening at opposite ends leading into the air-space, the diameter of the inner wall being such as to lit tightly around the flaring edge of the mouthpiece of a telephone-transmitter with a deadair space between said mouthpiece and said inner wall, and another mouthpiece connected to said walls.

8. In a device of the class described, an inner and an-outer concentric wall witli.an airspace between, one end of these walls being merged together and contracted, a detachable mouthpiece adapted to be fitted over said contracted ends, the other ends being closed, each wall having an opening therein leading into said air-space, the diameter of the inner wall being such as to iit closely over the fla-ring end of the mouthpiece of a telephone-transmitter, leaving an air-space between the said mouthpiece and the inner wall.

9. In a device of the class described, an inner and an outer concentric Wall with an air- TOO c orsedandthe other ends merged into each glace between, one end of the Weils being Space betweensaid mouthpiece and slaid inner Wah.

In Witness whereof I have hereunto set my hand, at the city oi' yNew York, counymidA other and contracted, a detachable mouthpiece fitting over'said contracted end, Sounddea-dcnillfr material covering the outer sur- State of .New York, this 11th day of Novem- 15 ffice 0i' che of theSe Wens, both wells having .belg- 1905.

openings leading into the air-space, thev di- JGS. G. KITCHELL. @meter of the inner Wall being such es to fit In presence of-a closely over the flaring end oi' the mouthpiece A. E. PALMER,

of@ telephone-transmitter, leaving en air- A GEORGE Eri-IRIDGE. 

